744 BULLETIN UNITED STATES GEOLOGICAL SURVEY. [VolY. 



1844. Cassin, J. [On the frequent occurrence of Strix nyctea in tbe vicinity of Phila- 

 delphia during the winter of 1843-4.] <^ Proc. Acad. Nat. Sci. Phila., ii, 1844, 

 pp. 19, 20. 



1844. Fayrer, — . [Letter from, accompanied by two specimens of Strix nyctea.] 

 <r. Z. ^\,xii, 1844, p. 19. 



1844. PucHERAN, Dr. Cousid6rations g6n<5rales sur Ics oiseaux de proie uoctui-nes ot 

 description de quelqucs especes peu connnes de cet ordre, de la collection du 

 mus^e de Paris. <^Arch. du Mus. d'Hist. Nat.,iy, 1844, pp. 311-343, pll. xxii- 

 xxiv. 



Scops rutilus, p. 326, pi. 22 {Bev. Mag. Zool., 1849, p. 29) ; Bubo inadascariensis, p. 328, pi. xxiii 

 (Otusmadag., Smith, /S. .il/r. Quart. Jour.,\\, 1835,316); Bubo inagellanicus, auct., p. 331; Otitt 

 fttygius, p. 336, pi. xxiv (Nyctalops stygius, Wagl., Isis, 1832, p. 1221) ; Syrnium ocellatum, p. SSO' 

 (Less., B. Z., ii, 1839, p. 289). 



1844. Thompson, W. Ueber Surnia nyctea, geschossen in September 1837. in eiuem 

 Steiubruch in der Grafschaft Down. <[ Olienh Isis, Bd. xxxvii, 1844, pp. 582, 

 583. 

 From Ann. Nat. Hist., 1838, p. 241. 



1844. Thompson, W. Ueber die Wanderung der Schnee-Eule (Sumia nyctea). 



< Oken's Isis, Bd. xxxvii, 1844, pp. 748, 749. 

 Ann. Nat. Hist, iii, 1839, p. 107. 



1845. LiLLJEBORG, W. [Om Stryx nyctea.] <^Ofvers. Eongl. Vetensk.-Jkad. Forhandl. 



for ar 1844, 1845, p. 212, 213. 



1846. Van Beneden, [P. J. ] Ueber das aussere Ohr der Eulen. <^ Oken's Isis, Bd. 



xxxix, 1846, J). 157. , 



Me7n. Soc. Boy. Sci. Liege, Tom. i, pt. i, 1843, pp. 121-124, pi. 3. 



1847. Cabot, S., Jr. [Occurrence of Syrnium ciuereum in Vermont and Massachu- 



setts. ] < Proc. Bost. Soc. Nat. Hist. , ii, 1847, p. 206. 



1848. Cassin, J. Descriptions of Owls, presumed to be uudescribed, specimens of 



which are in the collection of the Academy of Natural Sciences of Philadel- 

 phia. < Proc. Acad. Nat. Sd. Phila. , iv, 1848, pp. 121-125. 

 Ephialtes sagittatv..s, p. 121 ; B. watsonii, p. 123 ; Syrnium albogularis, S. virgatum, p. 124. 

 1848. CURTLER, M. Occurrence of the Short-eared Owl (Strix bracbyotus) near Wor- 

 cester. <] Zoologist, vi, 1848, p. 2063. 



1848. Kaup, J. J. Uebersicht der Eulen (Strigidae). < Oken's Isis, Bd. xli, 1848, pp. 



753-774. 



Sceloglaux, Hieracoglaux, Spiloglaux, Microptynx, p. 768; Microglaux, Pholeoptynx, Taenio- 

 glaux, Pisorhina, Megascops, Acnemis, Ptilopsis, Pseudoscops, p. 769; Bhinosirix, Phasmap- 

 tynx, Pseudoptynx, Megastrix, p. 770; Pulsatrix, p. 771.— Zusatze zu den Falconidce, Jsw, 1847, 

 616. (Vergl. 1851-52, u. 1859, Kaup, J. J.) 



1849. Cassin, J. Descriptions of Owls presumed to be undescribed. <^ Ann. Mag. Nat. 



Hist., 2d ser., iv, 1849, pp. 225-229. 

 From Proc. Acad. Phila, iv, 1848, pp. 121-12.5. 



1849. Pucheran, Dr. Observations sur les types peu connues du Musee de Paris. — 



Rapaces nocturnes. <^ Per. et Mag. de Zool. , i, 1849, pp. 17-28. 

 Types de MM. Vieillot et Lesson. 



1850. Cassin, J. Descriptions of Owls, presumed to be new species, in the collection 



of the Academy of Natural Sciences of Philadelphia. <^ Journ. Acad. Nat. Sci. 

 Phila., i\, pt. i,Nov., 1850, art. iv, pp. 51-54, pll. iii, iv, v. 



Already described, Proc. Acad., iv, Dec, 1848, p. 124; iv, Feb., 1849, p. 157. PI. iii, Syr- 

 nium virgatum ; pi. iv, S. albogularis ; pi. v, Nyctale harrisii. See same author at 1852. 



1850. Ellman, J. B. Note on the Long and Short-eared Owls (Strix otus and brachy- 



otoa). <^ Zoologist, viii, 1850, p. 2698. 

 1850. FOOTIT, W. F. Occurrence of the Snowy Owl (Strix nyctea) in the north of 



Scotland. < Zoologist, viii, 1850, p. 2923. 



